I don't see how iframes on the page could have anything to do with it. Possibly some configuration difference, but I need more information to produce the problem since I'm not seeing it.
I would try different skins and see if that has any effect on the problem and please tell me as much as possible about the installation like is it a root site or sub folder, using multi sites or not, using .NET 3.5 or .NET 4.
If you can identify steps to produce the problem I will treat it as a bug, but otherwise I think there are factors on your installation such as IIS modules or something else involved. Nothing has changed about the SSL support in a long time and no-one else has ever reported having this problem.
Given all your previous questions it seem likely that you are using custom code and produced your own build regardless of whether the page in question has any custom features on it.